Lane has now told People that Lowe knew the ring - a 3.15-carat cushion-cut platinum band featuring 165 diamonds - was "perfect" when he saw it.

"When he made his choice - of the ring, and of which woman he was picking - he was absolutely certain," Lane said, adding that Lowe wanted the piece to reflect Giudici's "style, spirit and fashion sense".

"He was really into it and loved that the cushion-cut was soft and romantic, with a vintage vibe that connected the modern and the past," he continued. "It resonated with him since it combined Catherine's sensibility as a modern woman with an appreciation for the past, and older things."

Lane also praised Lowe, describing him as "sincere" and "a real gentleman" and adding: "Most importantly, he was confident he had found the love of his life in Catherine. I'm so happy for them!"

Giudici, who has described her ring as "classic and timeless", shared a picture of the jewelery on her Instagram page yesterday.

The couple have confirmed that they plan to wed soon and televise their nuptials, though for the meantime Lowe will be busy taking part in the new season of Dancing with the Stars, which premieres Monday (March 18) on ABC.